1020421240 has 64 divisors (see below), whose sum is σ = 2325657600. Its totient is φ = 402924672.

The previous prime is 1020421219. The next prime is 1020421247. The reversal of 1020421240 is 421240201.

1020421240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020421247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1239469 + ... + 1240291.

It is an arithmetic number, because the mean of its divisors is an integer number (36338400).

Almost surely, 2^1020421240 is an apocalyptic number.

1020421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020421240 is an abundant number, since it is smaller than the sum of its proper divisors (1305236360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020421240 is a wasteful number, since it uses less digits than its factorization.

1020421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1020421240 is about 31944.0329326151. The cubic root of 1020421240 is about 1006.7612623025.

Adding to 1020421240 its reverse (421240201), we get a palindrome (1441661441).

The spelling of 1020421240 in words is "one billion, twenty million, four hundred twenty-one thousand, two hundred forty".